S. Piranomonte
A5059129619- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Radio Astronomy Observations and Technology
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Microbial Metabolites in Food Biotechnology
- Nuclear Physics and Applications
- Solar and Space Plasma Dynamics
- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Spectroscopy and Chemometric Analyses
- Advanced Research in Systems and Signal Processing
- Medical Imaging Techniques and Applications
- Calibration and Measurement Techniques
National Institute for Astrophysics
2009-2024
Astronomical Observatory of Rome
2015-2024
Trieste Astronomical Observatory
2021-2022
Centrum Badań Kosmicznych
2018
Polish Academy of Sciences
2018
Istanbul University
2018
American River College
2015
Campbell Collaboration
2015
Sapienza University of Rome
2007
Dublin City University
2007
Abstract We report the discovery and monitoring of near-infrared counterpart (AT2017gfo) a binary neutron-star merger event detected as gravitational wave source by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo (GW170817) short gamma-ray burst Fermi Gamma-ray Burst Monitor (GBM) Integral SPI-ACS (GRB 170817A). The evolution transient light is consistent with predictions for behavior “kilonova/macronova” powered radioactive decay massive neutron-rich nuclides...
We present a new catalogue of blazars based on multi-frequency surveys and an extensive review the literature. Blazars are classified as BL Lacertae objects, flat spectrum radio quasars or uncertain/transitional type. Each object is identified by root name, coded BZB, BZQ BZU for these three subclasses respectively, its coordinates. This being built tool useful identification extragalactic sources that will be detected future experiments X gamma-ray astronomy, like Swift, AGILE, Fermi-GLAST...
We have gathered optical photometry data from the literature on a large sample of Swift-era gamma-ray burst (GRB) afterglows including GRBs up to September 2009, for total 76 GRBs, and present an additional three pre-Swift not included in earlier sample. Furthermore, we publish 840 new points 42 GRB afterglows, sets 050319, 050408, 050802, 050820A, 050922C, 060418, 080413A 080810. analyzed light curves all derived spectral energy distributions with best quality, allowing us estimate host...
We propose a scenario where blazars are classified as flat-spectrum radio quasars (FSRQs), BL Lacs, low synchrotron, or high synchrotron peaked objects according to varying mix of the Doppler boosted radiation from jet, emission accretion disk, broad line region, and light host galaxy. In this framework peak energy power (nu_peak) in is independent source type luminosity. test new approach, which builds upon unified schemes, using extensive Monte Carlo simulations show that it can provide...
Gamma-ray bursts (GRBs) have been separated into two classes, originally along the lines of duration and spectral properties, called "short/hard" "long/soft." The latter conclusively linked to explosive deaths massive stars, while former are thought result from merger or collapse compact objects. In recent years, indications accumulating that short/hard versus long/soft division does not map directly onto what would be expected classes progenitors, leading a new classification scheme Type I...
Abstract The Lunar Gravitational-wave Antenna (LGWA) is a proposed array of next-generation inertial sensors to monitor the response Moon gravitational waves (GWs). Given size and expected noise produced by lunar seismic background, LGWA would be able observe GWs from about 1 mHz Hz. This make missing link between space-borne detectors like LISA with peak sensitivities around few millihertz future terrestrial Einstein Telescope or Cosmic Explorer. In this article, we provide first...
Gamma-ray burst (GRB) emission is believed to originate in highly relativistic fireballs. Currently, only lower limits were securely set the initial fireball Lorentz factor Gamma_0. We aim provide a direct measure of The early-time afterglow light curve carries information about Gamma_0, which determines time peak. have obtained early observations near-infrared afterglows GRB 060418 and 060607A with REM robotic telescope. For both events, peak could be clearly singled out, allowing firm...
We present a carefully selected sub-sample of Swift long gamma-ray bursts (GRBs) that is complete in redshift. The sample constructed by considering only with favorable observing conditions for ground-based follow-up searches, which are bright the 15–150 keV Swift/BAT band, i.e., 1-s peak photon fluxes excess to 2.6 photons s−1 cm−2. composed 58 bursts, 52 them redshift completeness level 90%, while another two have constraint, reaching 95%. For three we no constraint on high allows us first...
We present data and initial results from VLT/X-Shooter emission-line spectroscopy of 96 galaxies selected by long γ-ray bursts (GRBs) at 0.1 <z< 3.6, the largest sample GRB host spectra available to date. Most our GRBs were detected Swift 76% are 0.5 2.5 with a median zmed ~ 1.6. Based on Balmer and/or forbidden lines oxygen, nitrogen, neon, we measure systemic redshifts, star formation rates (SFR), visual attenuations (AV), oxygen abundances (12 + log (O/H)), widths (σ). study hosts up z...
Multi-messenger astronomy received a great boost following the discovery of kilonova AT2017gfo, optical counterpart gravitational wave source GW170817 associated with short gamma-ray burst GRB 170817A. AT2017gfo was first that could be extensively monitored in time both photometrically and spectroscopically. Previously, only few candidates have been observed against glare afterglows. In this work, we aim to search fingerprints AT2017gfo-like emissions optical/NIR light curves 39 GRBs known...
Abstract We present James Webb Space Telescope (JWST) and Hubble (HST) observations of the afterglow GRB 221009A, brightest gamma-ray burst (GRB) ever observed. This includes first mid-IR spectra any GRB, obtained with JWST/Near Infrared Spectrograph (0.6–5.5 micron) Mid-Infrared Instrument (5–12 micron), 12 days after burst. Assuming that intrinsic spectral slope is a single power law, F ν ∝ − β , we obtain ≈ 0.35, modified by substantial dust extinction A V = 4.9. suggests above notional...
Aims. With an observed and rest-frame duration of < 2s 0.5s, respectively, GRB090426 could be classified as a short GRB. The prompt detection, both from space ground-based telescopes, bright optical counterpart to this GRB offered unique opportunity complete detailed study. Methods. Based on extensive observational campaign, we obtained the spectrum afterglow GRB090426, measuring its redshift obtaining information about medium in which event took place. We completed follow-up observation...
We present the spectroscopic and photometric evolution of nearby (z = 0.059) spectroscopically confirmed Type Ic supernova, SN 2010bh, associated with soft, long-duration gamma-ray burst (X-ray flash) GRB 100316D. Intensive follow-up observations 2010bh were performed at ESO Very Large Telescope (VLT) using X-shooter FORS2 instruments. Thanks to detailed temporal coverage extended wavelength range (3000–24800 Å), we obtained an unprecedentedly rich spectral sequence among hypernovae, making...
Abundances of galaxies at redshifts z > 4 are difficult to obtain from damped Ly {\alpha} (DLA) systems in the sightlines quasars (QSOs) due forest blanketing and low number high-redshift detected. Gamma-ray bursts (GRBs) with their higher luminosity well suited study out formation first stars 10. Its large wavelength coverage makes X-shooter spectrograph an excellent tool interstellar medium (ISM) high redshift galaxies, particular if is not known beforehand. Here we determine properties a...
Short duration gamma-ray bursts (SGRBs) are thought to be related the violent merger of compact objects, such as neutron stars or black holes, which makes them promising sources gravitational waves. The detection a 'kilonova'-like signature associated Swift-detected GRB 130603B has suggested that this event is result object merger. Our knowledge on SGRB been, until now, mostly based absence supernova signatures and analysis host galaxies they cannot always securely associated. Further...
Observations of the afterglows long gamma-ray bursts (GRBs) allow study star-forming galaxies across most cosmic history. Here we present observations GRB 111008A from which can measure metallicity, chemical abundance patterns, dust-to-metals ratio and extinction host galaxy at z=5.0. The absorption system is a damped Lyman-alpha absorber (DLA) with very large neutral hydrogen column density log N(HI)/cm^(-2) = 22.30 +/- 0.06, metallicity [S/H]= -1.70 0.10. It highest redshift such precise...